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| author | Eric Dumazet <eric.dumazet@gmail.com> | 2010-05-10 11:33:06 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-05-17 17:18:51 -0700 |
| commit | 4a94445c9a5cf5461fb41d80040033b9a8e2a85a (patch) | |
| tree | 7891df11e4df4dd2c5149ef4fdc7d1301e7fca36 | |
| parent | 407eadd996dc62a827db85f1d0c286a98fd5d336 (diff) | |
| download | op-kernel-dev-4a94445c9a5cf5461fb41d80040033b9a8e2a85a.zip op-kernel-dev-4a94445c9a5cf5461fb41d80040033b9a8e2a85a.tar.gz | |
net: Use ip_route_input_noref() in input path
Use ip_route_input_noref() in ip fast path, to avoid two atomic ops per
incoming packet.
Note: loopback is excluded from this optimization in ip_rcv_finish()
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/ipv4/arp.c | 2 | ||||
| -rw-r--r-- | net/ipv4/ip_input.c | 4 | ||||
| -rw-r--r-- | net/ipv4/xfrm4_input.c | 4 |
3 files changed, 5 insertions, 5 deletions
diff --git a/net/ipv4/arp.c b/net/ipv4/arp.c index 80769f1..f094b75 100644 --- a/net/ipv4/arp.c +++ b/net/ipv4/arp.c @@ -854,7 +854,7 @@ static int arp_process(struct sk_buff *skb) } if (arp->ar_op == htons(ARPOP_REQUEST) && - ip_route_input(skb, tip, sip, 0, dev) == 0) { + ip_route_input_noref(skb, tip, sip, 0, dev) == 0) { rt = skb_rtable(skb); addr_type = rt->rt_type; diff --git a/net/ipv4/ip_input.c b/net/ipv4/ip_input.c index af76de5..d930dc5 100644 --- a/net/ipv4/ip_input.c +++ b/net/ipv4/ip_input.c @@ -331,8 +331,8 @@ static int ip_rcv_finish(struct sk_buff *skb) * how the packet travels inside Linux networking. */ if (skb_dst(skb) == NULL) { - int err = ip_route_input(skb, iph->daddr, iph->saddr, iph->tos, - skb->dev); + int err = ip_route_input_noref(skb, iph->daddr, iph->saddr, + iph->tos, skb->dev); if (unlikely(err)) { if (err == -EHOSTUNREACH) IP_INC_STATS_BH(dev_net(skb->dev), diff --git a/net/ipv4/xfrm4_input.c b/net/ipv4/xfrm4_input.c index abcd7ed..ad8fbb8 100644 --- a/net/ipv4/xfrm4_input.c +++ b/net/ipv4/xfrm4_input.c @@ -27,8 +27,8 @@ static inline int xfrm4_rcv_encap_finish(struct sk_buff *skb) if (skb_dst(skb) == NULL) { const struct iphdr *iph = ip_hdr(skb); - if (ip_route_input(skb, iph->daddr, iph->saddr, iph->tos, - skb->dev)) + if (ip_route_input_noref(skb, iph->daddr, iph->saddr, + iph->tos, skb->dev)) goto drop; } return dst_input(skb); |
